高速并行接收机中的频域符号同步算法  

A Frequency-Domain Symbol Synchronization Algorithm in High-speed Parallel Receiver

作　　者：刘策伦[1] 安建平[1] 李双焕[1] 王宇[2] 

机构地区：[1]北京理工大学信息与电子学院,北京100081 [2]中国空间技术研究院西安分院,西安710000

出　　处：《空间电子技术》2013年第2期42-45,共4页Space Electronic Technology

摘　　要：文章针对高速卫星通信系统接收机中的频域并行解调结构,提出了一种频域符号同步算法。该算法与频域并行解调结构相结合,可使频域并行解调结构的输出中只包含最佳采样点的值,从而进一步减少其实现时的复杂度。对算法的推导、实现结构进行了说明,并对该算法的捕获性能和跟踪性能进行了仿真。结果表明,该算法不仅实现复杂度低,适用于高速卫星通信系统,而且在低信噪比条件下也具有很好的性能,可满足实际的应用需求。This paper proposes a frequency-domain symbol synchronization algorithm for the frequency-domain demodu- lation structure. The algorithm combined with the frequency-domain parallel demodulation structure can make the output of the frequency-domain demodulation structure only contain the value of the best sampling points. Thus the implementation complexity is reduced further. In addition, this paper illustrates the algorithmg computational process and implementation architecture. The capture and tracking performance of the algorithm are simulated. The simulation results show that the structure has low implementation complexity and good performance in low signal-to-noise ratio （SNR） environment so that it can meet the practical application requirements in high-speed satellite communication systems.

关 键 词：卫星通信 并行解调 符号同步 低信噪比 

分 类 号：TN957.51[电子电信—信号与信息处理]